Press for forging car-wheels



6 Sheets-Sheet 1.

(No Model.)

W. A. PEARSON. PRESS FOR, FORGING GAR WHEELS. No. 449,824; Patented Apr. 7,1891.

N ESSES v INVENTOR 01 4,9575 ZMZa-WMWWA Am -(IA. P fi (No Mod 1 6 s h e e t s s n e e n 2.

PRESS FOR FORGING OAR. WHEELS,

(No Model.) 6 she ts-sheet s. W. A. PEARSON. PRESS EORFORGING OAR WHEELS.

Patented Apr. 7, 1891.

INVENTOR N-dModel.) e Sheets- Sheet 4.

' W. A. PEARSON.

PRESS FOR PORGING GAR WHEELS.

No. 449,824. Patented Apr. ,7, 1891.

INVENTOR we cams PETERS co; mom-1.1mm, WASHINGTON, n, c.

(No Model.) 6 Sheets-Sheet ,6. W. A. PEARSON. PRESS FOR PORGING GAR WHEELS.

Patented Apr. 7, 1891.

R O T N E V N I NITE STATES Prion.

PATENT THE BOIES STEEL WVHEEL COMPANY, OF PENNSYLVANIA.

PRESS FOR FORG'ING CAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 449,824, dated April 7, 1891.

Application filed May 14, 1890.

To all whom it may concern:

Be it known that I, WILLIAM A. PEARSON, of the city of Scranton, county of Lackawanna, and State of Pennsylvania, have invented certain new and useful Improvements in Presses for Forging Oar-Wheels, whereof the following is a specification, reference being hadto the accompanying drawings, in which Figure 1 is a side view of the hydraulic press. Fig. 2 is a vertical section of the upper and lower die and the annular contracte ing matrix. Fig. 3 is a view from above of the contracting matrix. Fig. 4 is a top view, and Fig. 5 is a side view, of the ingot after forging. Fig. 6 is a top View, and Fig; 7 is a side section, of the wheel-cen ter as completed. Fig. 8 shows more in detail the parts marked g and j, Fig. 3. Fig. 9 is a vertical section of the upper and lower die and the annular contracting matrix, showing a modification of the method of operating the same. Figs. 10

and 11 are respectively a half of a plan view and a side elevation of the modification shown in Fig. 9.

Fig.1 shows a large and strongly-constructed hydraulic press, the details of which it is unnecessary to describe.

Bis the lower and fixed die resting upon a bed-plate. The upper and movable die is 0 fixed upon the piston F.

O is an annular contracting matrix surrounding the upper die, fixed to the independent pistons D D, and capable of being lowered either by itself or in conjunction 3 5 with the upper die. This matrix is shown in section in Fig. 2. It consists of three rings, one above the other, strongly bolted together. The upper and lower ring have an inside diameter precisely that of the upper and lower dies, around which they fit closely. The inside diameter of the central ring is greater than that of the other two, and its inside surface presents a beveled edge tapering upward. (Seen in section 1 at h h in Fig. 2.) 5 Its height is somewhat greater than the depth of the periphery of the wheel-center which it is desired to forge. Within this central ring are a number of segments 6 6. These segments have a height somewhat less than that of the central ring, and consequently are capable of vertical play within the same. The

vertical slots 7t.

Serial No. 351,830. (No model.)

spaces between the movable segments are filled with wedge-shaped pieces or projections jj, having a depth equal to that of the movable segments and fixed around or forming part of the upper part of the central ring, so that they extend down only as far as the dotted line y g in Fig. 2. The spaces between the bases of these wedge-shaped pieces form At the back of each segment is a T-shaped lug g, Fig. 3, which is dovetailed into and runs in the slot 70. The back of each of the segments is beveled to correspond with the bevel of the central ring of the matrix, so that when they are in their lowermost position their inner edges form a circle-of greater diameter than when they are at the upper part of their play. WVhen they are in this latter position, their inner edges form almost a complete circle, (indicated by the dotted lines in Fig. 3,) having a diameter almost that of the wheel-center which itis desired to form. It will also be seen that when I they are in this latter position their upper and lower edges will exactly correspond with those of the wedge-shaped pieces jj, which consequently will exactly fill the interstices between them.

Theoperation of the press is as follows: A casting or ingot of approximately the shape of the wheel-center is heated and placed upon the lower die. The contracting matrix is then lowered until it surrounds the upper portion of this die and the movable segments in their lower position rest upon the lower die, completely inclosing the ingot. The upper die is then lowered. As soon as its face presses upon thetop of the wedges jj the matrix is forced to descend with it, and the movable segments being prevented from descending go farther by the lower die commence to contract. The result is that pressure is simultaneously applied to the top, bottom, and sides of the ingot. Other methods of actuating the segments 6 may be employed without departing from the spirit of my invention, which contemplates the simultaneous contraction of these segments along with the descent of the upper die.

In Figs. 9,10, and 11 I have shown a modi- 10o fication of my device, whereby the movement of the segments is obtained by independent of which the simultaneous actuation of all the segments 0 and under precisely the same pressure is secured. The segments c are no longer capable of any vertical movement, as in the device heretofore described, their simple horizontal motion now eifecting all that was previously accomplished by the combined motion.

Then the forging is complete, the center of the hub may be punched out while the forging is still in the matrix, the punch being operated by the piston-head. The completed forging is shown in Figs. l and 5, Figs. 6 and 7 showing the wheel-center after it is turned off to receive the tire.

Having thus described my invention, I Claim-- 1. In a press for forging, the combination" irtg the segments 6, adapted to be caused to contract simultaneously with the compression of the dies, substantially as described.

3. In a press for forging, the combination of the dies A B, the annular matrix C upon the independent pistons D D, containing the segments e, adapted to be caused to contract simultaneously with the compression of the dies, substantially as described.

4. In a press for forging, the combination of the dies A B, the annular matrix 0, having on its inside the beveled edge h, and the segments 6, playing against that edge, substantially as described.

5. In a press for forging, the combination of the dies A B, the annular matrix 0, having on its inside the beveled edge h, and the segments e, playing against that edge, the w edgeshaped blocks j between the segments, the slots 70 between these blocks, and the lugs g upon the back of the segments dovetailed into said slot, substantially as described.

6. In a press for forging, the combination of the dies A B and a series of circumferentially-arranged segmentse, each actuated by a horizontal hydraulic cylinder 15, and means, substantially as described, whereby the simultaneous actionof all said cylinderst may be secured, substantially as described.

WILLIAM A. PEARSON. Vitncsses:

J OHN G. MCASKIE, L. M. HORTON. 

